I found a great Call to Action today in the bathroom of the Holiday Inn Express. Their "Stay Smart" campaign reaches into the bathroom to the labels of the toiletry items.
What’s the difference between Soap, Shampoo, Conditioner, Lotion and Lens Wipe vs Cleanse, Wash, Tame, Soften and See?
VERBS. The strongest Call to Action is always a verb. Make people see themselves doing the thing you would like them to do.
(I’m just glad the toilet wasn’t labeled.)